FinTech & Payments

Block, Inc. (formerly Square) is a US-based digital payment and financial services company. The parent company rebranded to Block in 2021, while Square remains as the brand for the seller business. Also includes Cash App, TIDAL, and TBD.

Castellum.AI (founded 2019, NYC) provides financial crimes compliance platform with AML/KYC screening and AI agents. 83% alert resolution, 94% fewer false positives. 200K+ data sources. $12.6M raised.

Expensify is a payments superapp helping individuals and businesses simplify expense management and financial workflows. Offices in SF, Portland, London, Melbourne.

Featurespace provides adaptive behavioral analytics and machine learning for fraud prevention. Founded in Cambridge 2008, acquired by Visa in September 2024.

Fiat Republic (London-based) is Banking-as-a-Service fintech with $7M funding. Remote-friendly company providing embedded finance and payment solutions.

FloQast is an AI-powered accounting transformation platform trusted by 3,500+ global companies including Lululemon, DoorDash, and Chipotle. Automates accounting workflows, streamlines financial close processes, and manages enterprise compliance.

Flywire is remote-first global payments enablement for education, healthcare, travel, B2B. 4,000+ clients, 140 currencies, 240 countries. 1,200+ FlyMates from 40+ nationalities, 12 offices. React, Java, microservices, continuous delivery. No office requirement. Work-life integration culture.

Found is banking platform for self-employed individuals with business banking, expense tracking, and tax saving. Tech stack: Rails, Kubernetes, React, MySQL, TypeScript. Series B from Sequoia, Lightspeed, Founders Fund. Unlimited PTO, full benefits.

Lydia (founded 2011, Paris) is French mobile payment fintech unicorn with 8M users. ACPR-regulated electronic money institution. Split into Lydia (P2P payments) and Sumeria (mobile banking). €100M investment plan, hiring 400 people. 201-500 employees.

Monzo (London) is digital bank on AWS with Go/Cassandra/Kubernetes/Kafka stack. 300 engineers, 2,500 microservices, hundreds daily deployments. Cloud-native pioneer in financial services. Early Kubernetes adopter. Highly available fault-tolerant platform.

Orum provides real-time account-to-account payment network. Fintech company enabling faster money movement. Remote-friendly work culture.

Pismo (Brazil) is banking core platform and cloud-native solution for payments, banking, and marketplace financial services. Acquired by Visa. Technology for modern financial infrastructure.

Primer.io (founded 2019 by ex-PayPal execs Gabriel Le Roux & Paul Anthony) is fully virtual payment orchestration platform across 26 countries. $50M at $425M valuation. Universal Checkout, 3DS, fraud, tax. Integrates Worldpay, Stripe, Global Payments. Single API.

Qonto is a European fintech unicorn with 1,600+ employees revolutionizing business banking across FR/DE/IT/ES/RS. Targeting 2,000 staff by end 2025. 100% remote-friendly with comprehensive benefits.

Revolut is Europe's most valuable private tech company offering global banking, currency exchange, crypto trading, and financial tools. 2M+ lines of Python code. Cloud-native with autoscaling infrastructure.

Seon (founded 2017, Budapest) is fraud prevention platform serving 5,000+ merchants, 1B+ transactions. $94M Series C (highest Hungarian funding). 200+ employees in Budapest, London, Austin, Jakarta. PostgreSQL, API-first, AI/ML. 900+ signals, modular, explainable AI, 24hr deployment.

Stax Payments (founded 2014, Orlando FL) is high-growth end-to-end payments processor. $245M funding (Mar 2022). Processes $23B+ annually, 39K+ businesses/platforms in US/Canada. Integrated payments, recurring billing, SMB processing. MySQL, Webpack, Cloudflare. Full in-house development. Great Place to Work certified.

Stripe is a global online payments processing service for online businesses.

Taxdoo (Germany) is remote-first automated accounting and VAT compliance software for e-commerce. Cloud-based platform for EU and UK tax regulations. Integrates with Amazon, eBay, Shopify, ERPs. Automates transaction data collection and VAT evaluations across European countries.

Tilt (formerly Empower, San Francisco) is remote-first fintech using ML-powered credit models with 250+ financial signals. 14 countries, 12 time zones. .NET/C#, React, jQuery, TensorFlow, scikit-learn. Azure PaaS, Entity Framework, RDMS. WFH office reimbursement, full health coverage.

Vivid Money (founded 2019 by Artem Yamanov & Alexander Emeshev, Berlin) is financial super app with $886M valuation, $114M Series C 2022. COVID-native mobile-first. Solarisbank infrastructure (breaking away for own license). Visa debit cards. CSSF Luxembourg, AFM Netherlands regulated. Offices: Amsterdam, Luxembourg, Limassol.

Yokoy (founded 2019, Switzerland, merged with TravelPerk as 'Perk') is AI-powered spend management suite with 90% automation. Serves 500+ customers (Stadler Rail, On Running, Zühlke). AI categorizes expenses, spots discrepancies, policy checks, real-time currency/tax. Workcation expense management.